Improvement in burglar-alarms



E. D. REIOHARD. Burglar-Alarm.

N0. 198,04}. v vf tented Dec. 11, 1877 WITNESSES," m tun-mg UNITEDSTATES PATENT OEEIcE.

EDWIN D. REIOHARD, READING, PEWSYLVANIA.

IMPROVEMENT IN BURGLAR-ALARMS.

Specificationforming part of Letters Patent No. 198,044, dated December11, 1877; application filed November 6, 1877.

To all whom it may concern:

Be it known that I, EDWIN D. REICHARI), of

' Reading, in the county of Berks and State burglar-alarms auditconsists in the arrangement and combination of parts that will be morefully described hereinafter, whereby, when the burglar attempts to openthe door or Window of the house or room, a cartridge will be exploded,so as to sound an alarm.

The accompanying drawings represent my invention.

a represents a long narrow plate, that is adapted to be applied eitherto the window or to the side of a door-jamb, and it is held in place bythe two thumb'screws 0. Each of these screws has a sleeve, d, passedover it, so as to prevent it being screwed too far into the wood-work.Upon the top of this plate, near one corner, is secured the standard orpivot e, which has its upper end divided so as to allow the trigger g tobe pivoted in it. This trigger extends at about right angles to thelength of the plate, and is intended to overlap the edge of the door orwindow, so that when either one is being opened it will strike againstthis trigger. 7

Should the attempt to open the window or door fail to set the alarm off,the trigger .will act as a stop to prevent the window or door from beingopened until the alarm. is removed from its fastening and the triggerturned around.

The inner end of this trigger has a small shoulder formed upon its top,in whichthe short end of the hammer h catches.

When the trigger is tripped by the openin g of the door or window, thehammer, being impelled by the force of the double spring i, strikesagainst the cartridge, which is placed in the eye I, and a loudexplosion is the result. I

The spring is here made double in order to give the hammer great powerwhen it falls,

'stantially as described.

and the spring has one of its ends constantly bearing against the shortend of the lever, While the other one is held in position by means ofthe stud 0.

Under the trigger is placed the spring t, to

-make the trigger self-setting.

This alarm can be applied wherever there is a moving body tostrikeagainst it, so as to release the hammer from the trigger and cause anexplosion of the cartridge.

My invention is especially serviceable to a traveler, and is made smalland compact, so

that one, two, or more of them can be carried with him without taking upmuch room.

By means of the sleeves on the screws, not only are the screws preventedfrom entering too deeply into the wood-work, but the heads a of thescrews are prevented from getting down of the frame and the thumb-screwpassed into.

the sash, so that when the sash moves the trigger will be tripped andthe cartridge exploded. The lever, being pivoted near its upper end,causes the longer portion to strike with great power.

Having thus described my invention, 1

claim-.

l. The combination of the plate'a, screws 0,

vswivcled standard 0, having trigger g pivoted therein, hammer h, eye 1,and spring 2', the parts being arranged and combined to operate asshown.

' 2. In a burglar-alarm, the trigger g, pivoted upon the swiveled post6, and adapted to be turned across the edge of the Window or door,

so as to prevent them from being opened, sub- In' testimony that I claimthe foregoing I have hereunto set my hand this 25th day of October,1877.

EDWIN D. REIOHARD. Witnesses:

WILLIAM BERGER, ALBERT G. HENRY.

